The Principles of Psychology

The Principles of Psychology
Title page from the first edition.
AuthorWilliam James
CountryUnited States
LanguageEnglish
SubjectPsychology
PublisherHenry Holt and Company
Publication date
1890
Media typePrint (Hardcover and Paperback)
Pagesxviii, 1393

The Principles of Psychology is an 1890 book about psychology by William James, an American philosopher and psychologist who trained to be a physician before going into psychology. The four key concepts in James' book are: stream of consciousness (his most famous psychological metaphor); emotion (later known as the James–Lange theory); habit (human habits are constantly formed to achieve certain results); and will (through James' personal experiences in life).